2,793 research outputs found
Durable and Water-Floatable Ionic Polymer Actuator with Hydrophobic and Asymmetrically Laser-Scribed Reduced Graphene Oxide Paper Electrodes
No full textIonic polymer actuators driven by electrical stimuli have been widely investigated for use in practical applications such as bioinspired robots, sensors, and biomedical devices. However, conventional ionic polymer metal composite actuators have a serious drawback of poor durability under long-term actuation in open air, mainly because of the leakage of the inner electrolyte and hydrated cations through cracks in the metallic electrodes. Here, we developed a highly durable and water-floatable ionic polymer artificial muscle by employing hydrophobic and asymmetrically laser-scribed reduced graphene oxide paper electrodes (HLrGOP). The highly conductive, flexible, and cost-effective HLrGOP electrodes have asymmetrically smooth hydrophobic outer and rough inner surfaces, resulting in liquid-impermeable and water-floatable functionalities and strong bonding between an ionic polymer and the electrodes. More interestingly, the HLrGOP electrode, which has a unique functionality to prevent the leakage of the vaporized or liquid electrolyte and mobile ions during electrical stimuli, greatly contributes to an exceptionally durable ionic polymer graphene composite actuator that is a prerequisite for practical applications in active biomedical devices, biomimetic robots, touch-feedback haptic systems, and flexible soft electronics
Skin‐like Omnidirectional Stretchable Platform with Negative Poisson's Ratio for Wearable Strain–Pressure Simultaneous Sensor
No full textConventional elastomeric polymers used as substrates for wearable platforms have large positive Poisson's ratios (approximate to 0.5) that cause a deformation mismatch with human skin that is multidirectionally elongated under bending of joints. This causes practical problems in elastomer-based wearable devices, such as delamination and detachment, leading to poorly reliable functionality. To overcome this issue, auxetic-structured mechanical reinforcement with glass fibers is applied to the elastomeric film, resulting in a negative Poisson's ratio (NPR), which is a skin-like stretchable substrate (SLSS). Several parameters for determining the materials and geometrical dimensions of the auxetic-structured reinforcing fillers are considered to maximize the NPR. Based on numerical simulation and digital image correlation analysis, the deformation tendencies and strain distribution of the SLSS are investigated and compared with those of the pristine elastomeric substrate. Owing to the strain-localization characteristics, an independent strain-pressure sensing system is fabricated using SLSS with a Ag-based elastomeric ink and a carbon nanotube-based force-sensitive resistor. Finally, it is demonstrated that the SLSS-based sensor platform can be applied as a wearable device to monitor the physical burden on the wrist in real time.
Yves-Heng Lim
No full textYves-Heng Lim est enseignant-chercheur au Département d’Etudes de Sécurité et de Criminologie de l’Université Macquarie, Sydney. Il est l’auteur de China’s Naval Power: An Offensive Realist Approach (Ashgate, 2014). Yves-Heng Lim is a lecturer at the Department of Security Studies and Criminology, Macquarie University. He is the author of China’s Naval Power: An Offensive Realist Approach (Ashgate, 2014)
Professional attachment report [with] Chio Lim & Associates.
No full textThis report serves as a summary of the professional attachment. Besides touching on author experiences working with Chio Lim & Associates (CLA), it wil also touch on other issues before, during and after the program
Lim-inf convergence and its compactness
No full textAbstract- We describe the Mizar formalization of the proof of compactness of lim-inf convergence given in [W33] according to [CCL]. Lim-inf convergence formalized in [W28] is a Moore-Smith convergence investigated in [Y6] and involves the concept of nets. The proof is based on the equivalence of two approaches to convergence in topological spaces: filter convergence and Moore-Smith (net) convergence. The equivalence is worked out in [Y19] and different characterizations of compactness are also given there. These efforts are a continuation of the international project of formalizing the theory of continuous lattices headed by the first author
Beyond a Nature-inspired Lotus Surface: Simple Fabrication Approach Part I. Superhydrophobic and Transparent Biomimetic Glass Part II. Superamphiphobic Web of Nanofibers
No full textNon
“Survival – to keep writing”: An interview with Shirley Geok-lin Lim
No full textIn this e-mail interview conducted in 2016, author and scholar Shirley Geok-lin Lim addresses the changing social and political conditions in the United States. Lim discusses the affective relationship between aesthetics and politics in her work, the anxiety of multilingual stylistics, and the in-between nature of the transnation. She also reflects on the academic marginalization she has experienced as a result of her immigrant designation and subjectivity, as well as the indirect influence of China and Chineseness on her writing. Commenting on her memoir Among the White Moon Faces, Lim notes the difficulty of titling, and addresses the impact of anglophone literature upon her during her colonial Malaysian upbringing
Majelis Ta’lim Sebagai Alternatif Pusat Pendidikan Islam (Studi Kasus pada Majelis Ta’lim Se Kecamatan Natar Lampung Selatan)
No full textIn the public, living we see routine activities what is done. The routine activities are religious and non religious. Usually, religious activities are done in majelis ta’lim. Majelis ta’lim that grow in the community can to became alternative for central of islamic education if the managed well. Therefore, the author want to discuss about this issue with expectation to know of factors that cause the failure religious building in majelis ta’lim especially in Natar, so to know activities that required to done so as really became alternative for central of Islamic education. This research is quantitative research with collecting data from majelis ta’lim which became this research object. The collecting data is done with instruments: as observation, interview, and documentation. From this research, we can know that style and methode is done by the teacher is principal key to success in majelis ta’lim. Therefore, the inovation is required in majelis ta’lim activities so that can interest of more pilgrims and make him the alternative for central of Islamic education
- …
